Process for coloring spinning or like compositions for producing shaped structures



PROCESS FOR COLORING SPINNING R LIKE COMPOSITIONS FOR PRODUCING SHAPED STRUCTURES Hans Altermatt, Basel, Switzerland, assignor to Ciba Limited, Basel, Switzerland N0 Drawing. Filed Dec. 22, 1958, Ser. No. 781,888 Claims priority, application Switzerland Dec. 24, 1957 7 Claims. (Cl. 260--37) masses.

The present invention is based on the observation that in which A and A represent arylene radicals free from groups imparting solubility in water, and R represents an aryl radical free from groups imparting solubility in water, are excellently suited for coloring spinning compositions of all kinds, for example, viscose, cellulose ester, superpolyamide, polyacrylonitrile or polyethylene terephthalate spinning compositions.

In the above formulae A A and R are advantageously arylene or "aryl radicals of the benzene or naphthalene series. These radicals may contain substituents, for example, halogen atoms, especially chlorine or bromine atoms, or alkyl groups, especially methyl groups, alkoxy groups, aryl radicals especially benzene radicals, nitro groups or acylamino groups.

The dyestufis of the Formula 1 can be obtained by the process described in US. Patent No. 1,043,682, granted November 5, 1912, to Gadient Engi, by condensing indigo or a substitution product thereof such, for example, as di-, tetraor hexa-chloroor -bromoindigo, 7:7-dimethyl-indigo or naphthindigo, with an arylacetic acid halide, for example, phenylacetyl chloride or a substitution product thereof substituted in the henzene nucleus, for example, by a halogen atom or alkoxy, nitro or acylamino group, or aor ,B-naphthylacetyl chloateint ride or pyrenylacetyl chloride. The simplest member of this group of dyestuffs is the dyestufi of the formula 0 N (I n N C the process described in French Patent No. 17,427, granted June 21, 19 13, to Socita pour llndustrie Chimique,

.. Basel, Switzerland, by condensing a 2-thionaphthalene-2- i-ndole-indigo which may be substituted by a halogen atom or alkoxy or alkyl group, with an arylacetic acid halide of the kind referred to above.

The material to be colored is advantageously mixed mechanically in the form of powder, granules or chippings with the dried dyestuif powder in such manner that the surface of the particles of the material become coated with a layer of the dyestufi. The dyestufi is advantageously used in a finely dispersed form such as is obtained, for example, by precipitating the crude dyestufi from sulfuric acid or grinding the crude dyestuff with an organic solvent. The particles of the artificial plastic so coated are then melted and spun in known manner or subjected to some other shaping operation, for example, to produce foils.

In the process of this invention the dyestufis can also be used for coloring organic substances of high molecular weight, for example, cellulose esters. or viscose which are spun with the use of a solvent. In the case of viscose the dyestuif pigment is advantageously added in the parts being by weight:

Example 1 v 99 parts of a polyamide from hex'amethylene diamine j. and adipic acid in the form of chippings are dry coated by mechanical mixing with 1 part ot the dyestufi of the formula 0 N a n in a very finely divided form. The coated chippings are spun in the usual manner, torexample, by the grid "spinning method, at about 290-295 C. The thread so obtained has a brilliant red color, and the coloration has good properties of fastness.

In the following table are given in column I further hexamethylene diamine and adipic acid the tints given in column II. In column H1 is given the literature reference and in which the preparation of the dyestufi is described: R

I II III 5 0 in which A and A represent' benzene radicals free from groups imparting solubility in water, and R represents a member selected from the group consisting of phenyl and 0 naphthyl radicals free from groups imparting solubility in I! water.

2. Fibers and shaped structures produced by the process 1 o N U S t claimed in claim 1.

"' g i id iggs z I 3. A process for coloring polyamide spinning composi- =G tion which comprises mcorporatmg 1n the composition a N/ dyestuff of the formula fi-C H5 0 o-oo (I D N\ /C 0 o0--o 25 2. v orange FrleInch Patent 0. 17,427. 0: 4. A process for coloring polyamide spinning composition which comprises incorporating in the composition a dyestufi of the formula 0 C-(II; 4s v \N G N s--- violet-" Us. Patent No.-

1,043,682. o=o G=C N 'o C \c c;

o-o g 5. A process for coloring polyamide spinning composi- What is claimed is: I tion which comprises incorporating in the composition a 1. A process for coloring polyamide spinning composi- Yesmfi of the formula tion which comprises incorporating in the composition a. member selected from the group consisting of dyestufi of the formulae C B R \C=O/ -co 6% 7o a 0-0 A o=o /A: 0/ f I V R 6. A process for coloring polyamide spinning composi- 5 6 tion which comprises incorporating in the composition a and dyestufi of the formula R A1\ /C=C\ /A: 0 s 00 \Ht in which A; and A represent benzene radicals free from C groups imparting solubility in water, and R represents a 0: member selected from the group consisting of phenyl and naphthyl radicals free from groups imparting solubility in N 0 water.

o-o References Cited in the file of this patent UNITED STATES PATENTS 1,043,682 Engi Nov. 5, 1912 2,289,774- Graves July 14, 1942 No; 2,383,995 Stanley et a1 Sept. 4, 1945 7. The combination of (a) a polyamide spinning com- 27O1211 Q P et a1 1955 position and (b) a member selected from the group con- 2739153 wllliams 1956 Sisfing f d t fl f the fommlae 2,350,520 Merlan 6t p 1953 R un A1 /G=C\C/Ag 

1. A PROCESS FOR COLORING POLYAMIDE SPINNING COMPOSITION WHICH COMPRISES INCORPORATING IN THE COMPOSITION A MEMBER SELECTED FROM THE GROUP CONSISTING OF DYESTUFF OF THE FORMULAE 